Ask YC:are OpenSocial + JS Frameworks a good idea?

I am wondering if any of you are making OpenSocial Apps, and using a JavaScript Framework like jQuery, Prototype, MooTools, etc... It seems like Google assumes you will not be using any other JS Framework, and some functionality like storing JSONs as User Persistent data might become bloated if not stript of all of the framework prototype additions.

I am wondering what our little community thinks? I would be really nice to use some of the animation and selector features that the JS Frameworks offer.